b79c6aa6a1
The commands surrounded by ( ) are executed in a subshell, but in most cases, we do not need to spawn an extra subshell. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2.5 KiB
Executable File
#!/bin/sh
SPDX-License-Identifier: GPL-2.0
TARGET=$1 ARCH=$2 SMP=$3 PREEMPT=$4 CC=$5
vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
If compile.h exists already and we don't own autoconf.h
(i.e. we're not the same user who did make *config), don't
modify compile.h
So "sudo make install" won't change the "compiled by "
do "compiled by root"
if [ -r $TARGET -a ! -O include/generated/autoconf.h ]; then vecho " SKIPPED $TARGET" exit 0 fi
Do not expand names
set -f
Fix the language to get consistent output
LC_ALL=C export LC_ALL
if [ -z "$KBUILD_BUILD_VERSION" ]; then VERSION=$(cat .version 2>/dev/null || echo 1) else VERSION=$KBUILD_BUILD_VERSION fi
if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
TIMESTAMP=date
else
TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
fi
if test -z "$KBUILD_BUILD_USER"; then
LINUX_COMPILE_BY=$(whoami | sed 's/\/\\/')
else
LINUX_COMPILE_BY=$KBUILD_BUILD_USER
fi
if test -z "$KBUILD_BUILD_HOST"; then
LINUX_COMPILE_HOST=hostname
else
LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST
fi
UTS_VERSION="#$VERSION" CONFIG_FLAGS="" if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP"
Truncate to maximum length
UTS_LEN=64 UTS_TRUNCATE="cut -b -$UTS_LEN"
Generate a temporary compile.h
{ echo /* This file is auto generated, version $VERSION */ if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi
echo #define UTS_MACHINE "$ARCH"
echo #define UTS_VERSION "echo $UTS_VERSION | $UTS_TRUNCATE"
echo #define LINUX_COMPILE_BY "echo $LINUX_COMPILE_BY | $UTS_TRUNCATE"
echo #define LINUX_COMPILE_HOST "echo $LINUX_COMPILE_HOST | $UTS_TRUNCATE"
echo #define LINUX_COMPILER "$CC -v 2>&1 | grep ' version ' | sed 's/[[:space:]]*$//'"
} > .tmpcompile
Only replace the real compile.h if the new one is different,
in order to preserve the timestamp and avoid unnecessary
recompilations.
We don't consider the file changed if only the date/time changed.
A kernel config change will increase the generation number, thus
causing compile.h to be updated (including date/time) due to the
changed comment in the
first line.
if [ -r $TARGET ] &&
grep -v 'UTS_VERSION' $TARGET > .tmpver.1 &&
grep -v 'UTS_VERSION' .tmpcompile > .tmpver.2 &&
cmp -s .tmpver.1 .tmpver.2; then
rm -f .tmpcompile
else
vecho " UPD $TARGET"
mv -f .tmpcompile $TARGET
fi
rm -f .tmpver.1 .tmpver.2